Side Step Nerf Bars function as a safer way of getting in and out of your car, but will also gives a new aggressive but stylish look. Its hollow reinforced tube structure ensures that the bars are light but still provide a strong step for years to come.. GMC CK PICKUP 88-98 GMC C/K PU Ext Cab SIDEBAR 3inch Stainless EXTENDED CAB Nerf Bars & Tube Side Step Bars Stainless Products PERFORMANCE 1 SET RH & LH 1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998